A method for preparing a compound having the formula:
including the steps of:
(a) cyclizing a compound of formula II:
to form a compound of formula I:
(b) deprotecting the nitrogen atom of the compound of formula I by amination or hydrogenation to form compound III.
一种制备具有以下
化学式的化合物的方法,包括以下步骤:
(a) 环化化合物 II 的步骤以形成化合物 I;
(b) 通过
氨化或氢化去保护化合物 I 的氮原子以形成化合物 III。